Duplex steel flanges are critical components in various industrial applications, renowned for their exceptional corrosion resistance, high strength, and durability. These flanges are fabricated from duplex stainless steel, a material renowned for its unique combination of properties derived from its dual-phase microstructure. Duplex steel comprises roughly equal parts of austenitic and ferritic stainless steels, offering enhanced mechanical and corrosion-resistant characteristics compared to conventional stainless steels.
Specifications and Uses of Duplex Steel Flanges
Duplex steel flanges find extensive use across industries such as oil and gas, chemical processing, petrochemicals, marine engineering, and more. Their robustness and resistance to harsh environments make them ideal for applications involving corrosive fluids, high pressures, and elevated temperatures. These flanges are designed to connect pipes, valves, and other equipment, ensuring leak-free operations even in demanding conditions.
Advantages of Duplex Steel Flanges
Corrosion Resistance: Duplex steel flanges exhibit superior corrosion resistance, making them suitable for applications where conventional stainless steel may fail.
High Strength: With higher tensile and yield strength compared to austenitic stainless steels, duplex steel flanges offer improved mechanical properties, contributing to enhanced reliability and longevity.
Cost-Effectiveness: Despite their superior performance, duplex steel flanges often provide a cost-effective solution due to their longevity and reduced maintenance requirements.
Versatility: These flanges can withstand a wide range of temperatures and pressures, offering versatility in various industrial applications.
Resistance to Stress Corrosion Cracking (SCC): The dual-phase microstructure of duplex steel imparts resistance to stress corrosion cracking, a common issue in harsh environments.
Manufacturing Process Of Duplex Flanges
Raw Material
The system controls inspect the raw material quality at the first stage in accordance with the test certificate as well as dimensions and appearance.
Material Cutting
This method of making flanges involves cutting stripes from the center plate and rolling them into a circle.
Forging
Compared to cast flanges, forged flanges typically contain less carbon and are less likely to corrode. Temperature control, weight measurement, and material grade checking are used in forgings.
Heat Treatment
The total forging cooling speed is the slowest throughout this heat treatment procedure; the standardizing and decreasing cooling speeds are faster.
Final Inspection
Measure and check the flange's dimensions and size using this procedure.
Types of Duplex Steel Flanges
Weld Neck Flanges: These flanges feature a tapered hub to facilitate
welding to pipes, providing excellent structural strength and integrity.
Slip-On Flanges: Designed for easy installation, slip-on flanges slide
over the pipe and are then welded in place. They are ideal for low-pressure
applications.
Socket Weld Flanges: These flanges are attached to the pipe by inserting
the pipe into the socket end and then welding around the joint. They offer good resistance
to leakage.
Threaded Flanges: Threaded flanges have internal threads to connect with
externally threaded pipes or fittings, providing ease of installation and maintenance.
Blind Flanges: Used to seal the end of a piping system or vessel, blind
flanges do not have a bore and are bolted over the end of the pipe.
Chemical Composition of Duplex Steel Flanges
The chemical composition of duplex steel flanges typically includes elements such as:
- Chromium (Cr): Provides corrosion resistance.
- Nickel (Ni): Contributes to strength and toughness.
- Molybdenum (Mo): Enhances corrosion resistance, especially in chloride environments.
- Nitrogen (N): Improves strength and corrosion resistance.
- Iron (Fe): The base element providing structural integrity.
Duplex Steel Flanges Mechanical Properties
The mechanical properties of duplex steel flanges depend on factors such as grade, manufacturing process, and heat treatment. However, typical mechanical properties include:
- Tensile Strength: Typically ranging from 620 to 900 MPa, depending on the grade and condition.
- Yield Strength: Varies between 450 and 700 MPa, influencing the material's ability to withstand deformation under load.
- Elongation: Generally, ranges from 25% to 30%, indicating the material's ductility.
- Hardness: Typically, in the range of 20 to 35 HRC (Rockwell hardness), depending on the grade and heat treatment.
Why Choose Calico Metal Alloys LLP?
Calico Metal Alloys LLP stands out as a premier choice for duplex steel flanges for several compelling reasons. We are renowned for our commitment to quality, offering flanges that meet stringent industry standards. Our extensive experience and expertise in the field ensure that customers receive top-notch products tailored to their specific requirements. We prioritize customer satisfaction, providing excellent service, timely delivery, and competitive pricing. With a reputation for reliability, professionalism, and integrity, choosing Calico Metal Alloys LLP guarantees peace of mind and optimal performance for your industrial applications.
Duplex Steel Flanges Specifications
| Standard | ASTM A182 / ASME SA182 |
| Dimensions | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Flange Size Chart | 1/2" (15 NB) to 48" (1200NB), DN10~DN5000 |
| Pressure Rating | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| JIS | 16 K, 5K, 10 K, 20 K, 30 K, 40 K, 63 K |
| Flange Connection / Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove, Flange Pipe. |
| Origin | West Europe / Japan / Indian / USA / Korean |
| Types of Flanges | Threaded / Screwed / Forged / Plate |
| Coating | Yellow Transparent, Zinc Plated, Anti-rust Paint, Oil Black Paint, Cold and Hot Dip Galvanized |
| Production technique Used | Heat treated, Forged and Machined |
| Equipment | Press machine, Bending machine, Pushing Machine, Sand-blasting machine, electric bevelling machine etc. |
| Test Certificates | EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report, etc |
Types Of Duplex Stainless Steel Flanges
Duplex Steel Weld Neck Flange
Duplex Steel Blind Flange
Duplex Steel Slip on Flange
Duplex Steel Socket weld Flange
Duplex Steel Spectacle Blind Flange
Duplex Steel Threaded Flange
Other Types Of Duplex Steel Flanges
| DSS Flanges | Duplex Steel Lap Joint Flange |
| Duplex Steel Long Weld Neck Flange | Duplex Steel Industrial Flanges |
| Duplex Steel Forged Flanges | Duplex Steel RTJ Flange |
| Duplex Stainless Steel Plate Flange | UNS Square Flange |
| F51 Duplex Stainless Steel Flanges | Duplex Stainless Steel F51 SORF Flange |
| DSS WNRF Flange | Duplex Steel SWRF Flanges |
| ASME SA182 Duplex Steel Pipe Flanges | ASTM A182 Duplex Steel Plate Flange |
| Duplex Stainless Steel Flat Face Flange | Duplex Steel BS 4504 Flanges |
| Duplex Steel Orifice Flange | Duplex Steel Groove & Tongue Flanges |
| ANSI B16.5 Duplex Steel Flanges | Duplex Steel Loose Flange |
Duplex F51 Flanges Industrial Application
Electrical
Automotive
Construction
Defence
Pharmaceutical
Petroleum
Petrochemical
Milk & Dairy
Export & Supply Destinations Of Duplex Flanges
Liechtenstein, Spain, Belarus, Serbia, France, Finland, Bulgaria, Sweden, Latvia, Moldova, Monaco, Azerbaijan, Czechia/Czech Republic, Luxembourg, Belgium, Italy, Austria, Slovakia, Hungary, Greece, Romania, Switzerland, Germany, Turkey, Portugal, Russia, Ireland, Denmark, Lithuania, United Kingdom, Cyprus, Norway, Estonia, Poland, Ukraine, Malta, Croatia, Netherlands.
Sri Lanka, Kuwait, Indonesia, Japan, Taiwan, Israel, Philippines, Myanmar, Macau, Bangladesh, Singapore, Lebanon, Saudi Arabia, Afghanistan, Hong Kong, Iraq, Armenia, Mongolia, Egypt, Qatar, Bhutan, Thailand, Turkey, Bahrain, Maldives, British, North Korea, Nepal, United Arab Emirates, Iran, Kyrgyzstan, South Korea, Malaysia, Azerbaijan, Oman, Vietnam, India, Jordan, China, Russia.
Angola, Liberia, Mauritius, Libya, Mauritania, Eswatini, Mozambique, Namibia, Senegal, Niger, Zambia, Zimbabwe, Tunisia, Central African Republic, Gambia, Kenya, Uganda, Nigeria, Burkina Faso, Morocco, Ethiopia, South Africa, Egypt, Tanzania, Algeria, Madagascar, Rwanda, Botswana, Burundi, Seychelles, Cameroon.
El Salvador, Jamaica, Antigua and Barbuda, Belize, Dominican Republic, Canada, Panama, Costa Rica, Barbados, Bahamas, Haiti, United States of America, Grenada, Honduras, Cuba, Guatemala, Saint Lucia, Saint Vincent and the Grenadines, Nicaragua, Dominica, Trinidad and Tobago, Mexico.
Paraguay, Colombia, Guyana, Suriname, Ecuador, Bolivia, Venezuela, Brazil, Peru, Argentina, Chile, Uruguay.
